我有一个TextField,想要对textfiels焦点执行一些操作
TextField textField = new TextField();
我该怎么打印
System.ou.prinln("Focus Out");
从文本区域聚焦时。
答案 0 :(得分:2)
JavaFX 2.2
TextField有一个公开 focusedProperty继承自Node类,只需添加ChangeListener并实施{ {3}}方法。
public class App extends Application {
@Override
public void start(Stage primaryStage) {
TextField txt1= new TextField("text 1");
TextField txt2= new TextField("text 2 ");
Button btn= new Button("hello");
StackPane root = new StackPane();
VBox vBox= VBoxBuilder.create()
.children(txt1, btn, txt2)
.build();
txt1.focusedProperty().addListener(new ChangeListener<Boolean>() {
@Override
public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
if (t1) {
System.ou.prinln("Focus In");
} else {
System.ou.prinln("Focus Out");
}
}
});
root.getChildren().add(vBox);
Scene scene = new Scene(root, 500, 400);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* The main() method is ignored in correctly deployed JavaFX application.
* main() serves only as fallback in case the application can not be
* launched through deployment artifacts, e.g., in IDEs with limited FX
* support. NetBeans ignores main().
*
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}